12-Letter Words Matching ____O__N____

There are 126 12-letter words that match ____O__N____. 27 are common words, such as CARBORUNDUMS and CONDOMINIUMS. A rarer one is URINOGENITAL. In this set, E is the most frequent open letter (104 words). 4 words contain a doubled letter.

Full list 126

Common words

carborundumscondominiumscosmogonistsdipsomaniacsethnocentricheliocentrichydrodynamichydrogenatedhydrogenatesmicromanagedmicromanagesnecromancers
carborundumscondominiumscosmogonistsdipsomaniacsethnocentricheliocentrichydrodynamichydrogenatedhydrogenatesmicromanagedmicromanagesnecromancersnecromanciesorthodontiasorthodonticsorthodontistperiodonticsperiodontistphenomenallyphilodendronpredominancepredominatedpredominatesprimogenitorratiocinatedratiocinatesrhododendronagamogenesesagamogenesisangiogenesiscaenogenesischiromancerschiromanciescomponentialcosmogonicalcyclopentanedorsoventralglycogenesishistogenesishydrokinetichypnogenesiskaryokinesisliriodendronmicrofinancemicromanagernitrobenzeneorthodontureorthogenesisorthogeneticorthogonallyosteogenesispathogenesespathogenesisphotokinesisphotomontagephylogeneticphytogenesispredominancypredominatorprimogenitalratiocinatorsacrosanctlyscolopendridsporogenesissubdominantsandrocentricandrogenesesandrogenesisandrogeneticangiogenesesangiotensinsantiozonantschatoyanciescladogenesescladogenesiscladogeneticconsonanciescyanogenesescyanogenesiscyanogeneticcyclogenesescyclogenesisgeobotanicalgeobotanistsglucokinasesglycogeneseshistogeneseshistogenetichydrogenaseshydromancieskaryokineseskaryokineticlabiodentalsmandolinistsmicrotonallymythomaniacsneurosensorynitrogenasesnonbotanistsnondominantsnonvoluntarynormotensiveorthocentersorthogenesesosteogenesespaedogenesespaedogenesispaedogeneticpathogeneticpetrogenesespetrogenesispetrogeneticphotodynamicphotoionizedphotoionizesphotokinesesphotokineticprenominatedprenominatesprepotenciespronominallyrhodomontadescolopendrassporogenesessubpotenciesurinogenital

About this list

Words
126 (27 common words)
Common example
carborundums
Rare example
urinogenital
Doubled letters
4
Ending in S
71
Most frequent letter
E (104)

Questions

How many 12-letter words matching ____o__n____ are there?

126. 27 of them are common words.

What is a common example?

CARBORUNDUMS is among the common words in this set.